PITTSBURGH - DECEMBER 11: Running back Herschel Walker #34 of the Philadelphia Eagles runs with the football during a game against the Pittsburgh Steelers at Three Rivers Stadium on December 11, 1994 in Pittsburgh, Pennsylvania. (Photo by George Gojkovich/Getty Images) George Gojkovich Getty Images

SAN JOSE, CA - JANUARY 27: Heisman trophy winner Herschel Walker poses during a portrait session before his MMA debut on January 27, 2010 at the AKA gym in San Jose, California. (Photo by Landry Major/Getty Images) Landry Major Getty Images

PHILADELPHIA, PA - July 13, 1992: Herschel Walker #34 of the Philadelphia Eagles speaks with reports at a press conference after he signed a free agent contract with the Philadelphia Eagles on July 13, 1992 in Philadelphia, Pennsylvania. Walker played for the Eagles form 1992-94. (Photo by Eb Mahan/Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

LA PLAGNE, FRANCE - FEBRUARY 1992: Herschel Walker of the UNited States during the XVI Winter Olympics circa February 1992 in La Plagne, France. Walker is better known as an NFL running back with the Minnesota Vikings.. (Photo by Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

LA PLAGNE, FRANCE - FEBRUARY 1992: Herschel Walker (L) and Brian Shimer in the USA-1 sled during a practice session for the XVI Winter Olympics two man bobsleigh circa February 1992 in La Plagne, France, The U.S. team placed 7th, the best American finish since 1980. Walker is better known as an NFL running back with the Minnesota Vikings.. (Photo by Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

KANSAS CITY, MO - SEPTEMBER 9: Running back Herschel Walker #34 of the Minnesota Vikings carries the ball against the Kansas City Chiefs during an NFL football game September 9, 1990 at Arrowhead Stadium in Kansas City, Missouri. Walker played for the Viking from 1989-91. (Photo by Focus on Sport/Getty Images) Focus On Sport Getty Images

DENVER, CO - OCTOBER 5: Herschel Walker #34 of the Dallas Cowboys gets tackled by Greg Kragen #71 of the Denver Broncos during an NFL football game October 5, 1986 at Mile High Stadium in Denver, Colorado. Walker played for the Cowboys from 1986-89 and 1996-97. (Photo by Focus on Sport/Getty Images) Focus On Sport Getty Images

ATHENS, GA - CIRCA 1986: Herschel Walker, #34 of the University of Georgia Bulldogs football team runs the ball up field against the Louisiana State University Tigers at Sanford Stadium in Athens, Georgia. (Photo by University of Georgia/Collegiate Images/Getty Images) Collegiate Images Collegiate Images/Getty Images

NEW YORK, NY - CIRCA 1982: Herschel Walker of the University of Georgia Bulldogs poses with his Heisman Trophy at the Downtown Athletic CLub circa 1982 in New York City. (Photo by Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

ATHENS, GA - Circa 1982: Herschel Walker of the University of Georgia Bulldogs scores a touchdown against the Florida Gators circa 1982 in Athens, Georgia. Walker attended the University of Georgia between 1980 and 1982 playing Football and running Track. (Photo by Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

ATHENS, GA - DECEMBER 5, 1981: Herschel Walker of the University of Georgia Bulldogs scores his fourth touchdown of the game against the Georgia Tech Yellow Jaclets on December 5, 1981 in Athens, Georgia. Walker attended the University of Georgia between 1980 and 1982 playing Football and running Track. (Photo by Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

ATHENS, GA - CIRCA 1980: Herschel Walker of the University of Georgia Bulldogs, UPI's Back of the Year by United Press International stands with head coach Vince Dooley, UPI's Coach of the Year circa 1980 in Athens, Georgia. Walker attended the University of Georgia between 1980 and 1982 playing Football and running Track. (Photo by Sporting News via Getty Images) The Sporting News Sporting News via Getty Images

Usher with former football player, Herschel Walker during pre-race of the NASCAR All Star Challenge at the Lowes Motor Speedway, May 20, 2006. (Photo by Kevin Kane/WireImage) Kevin Kane WireImage

10 Sep 1995: Running back Herschel Walker #34 of the New York Giants runs downfield against the Kansas Ciy Chiefs during a game held at Arrowhead Stadium in Kansas City, Missouri. The Chiefs won the game, 21-17. Mandatory Credit: Jonathan Daniel /Allsp Jonathan Daniel Getty Images